diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index b59c946..0c485a5 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -445,7 +445,7 @@
 	if (cpu == NR_CPUS)
 		return NULL;
 
-	BUG_ON(cpu >= num_possible_cpus());
+	BUG_ON(cpu >= nr_cpu_ids);
 	return get_gcwq(cpu);
 }